Species Profile
Delta Smelt
Species Details
Common NameDelta Smelt
Scientific NameHypomesus Transpacificus
Federal Listing StatusThreatened
Federal Regulating AgencyU.S. Fish and Wildlife Service
State Listing StatusThreatened (CA)
State Regulating AgencyCalifornia Department of Fish and Game
IUCN Red List StatusEndangered B1+2cd) (1996)
- Kimball Island Mitigation Bank
- Liberty Island Conservation Bank

Species Range
Delta smelt are found only in the Sacramento-San Joaquin Estuary, where the Sacramento and San Joaquin Rivers flow into San Francisco Bay. They have been found as far upstream as the mouth of the American River on the Sacramento River and Mossdale on the San Joaquin River. They extend downstream as far as San Pablo Bay. Delta smelt are found in brackish water. During the late winter to early summer, delta smelt migrate to freshwater to spawn.
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